INVINCIBLEFollow the steps below..
1. Go to the Weapon Select menu and select the Frying Pan with L1 or R1.
2. Return
to your game.
3. Go back to the Weapon Select and press: Circle + R1.
4. Keep doing
so until you get a flashing 999 as your health counter.

FULL INVENTORY
Follow the steps below..
1. On the map screen press: Left until the arrow that represents you is pointing
towards you.
2. Hit Start to return to standard view and while the camera
rotates press:
L1 + Square + X + Circle. then press Triangle.